<template>
    <div>
        <div class="search">
            <input v-model="keyword" type="search" class="search-input" placeholder="输入城市名或拼音">
        </div>
        <div class="search-content" ref="search" v-show="keyword">
            <ul>
                <li 
                    class="srarch-item border-bottom"
                    v-for="item of list"
                    :key="item.id"
                    @click="handelCityClick(item.name)"
                >{{item.name}}</li>
                <li class="srarch-item border-bottom" v-show="hasNoData">没有找到匹配数据！</li>
            </ul>
        </div>
    </div>
</template>

<script>
//引入移动端滚动条插件betterscroll，文档：https://www.npmjs.com/package/better-scroll
import BScroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
    name: 'CitySearch',
    props: {
        cities: Object
    },
    data () {
        return{
            keyword: '',
            list: [],
            timer: null
        }
    },
    computed: {
        hasNoData () {
            return !this.list.length
        }
    },
    watch: {
       keyword () {
        if (this.timer) {
            clearTimeout(this.timer)
        }
        if (!this.keyword) {
           this.list = []
           return 
        }
        this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
       } 
    },
    methods: {
         handelCityClick (city) {
          //this.$store.commit('changeCity', city)
          this.changeCity(city)
          this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted () {
        //使用betterscroll
      this.scroll = new BScroll(this.$refs.search)
    }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
    .search
        height .72rem
        padding .1rem
        background $bgColor
        .search-input
            box-sizing border-box
            width 100%
            height .62rem
            line-height .62rem
            text-align center
            color #666666
            border-border-radius .06rem
    .search-content
        z-index 1 
        overflow hidden
        position absolute
        top 1.68rem
        left 0
        right 0
        bottom 0
        background #eeeeee
        .srarch-item
            line-height .62rem
            padding-left .2rem
            background #fff
            color #666
</style>

